United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "May 1970," Business Conditions Digest (May 1970) : 106-106. https://fraser.stlouisfed.org/title/43/item/7542/toc/272056 , accessed on April 23, 2024.
United States. Bureau of the Census. "Stock Prices," in United States. Bureau of the Census. "May 1970," Business Conditions Digest (May 1970) : 106-106. https://fraser.stlouisfed.org/title/43/item/7542/toc/272056 , accessed on April 23, 2024.